#include<bits/stdc++.h>
using namespace std;
int main() { 
  int n;
  cin>>n;
  if (n%2==0) cout<<"y e s";
  else cout<<"n o";
    return 0;
}
/**************************************************************
	Problem: 1033
	User: wangyousi
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/